Operational power performance of south-facing vertical BIPV window system applied in office building

The analysis using the simulation showed the adjacent building did not cast any shading but affected on decrease in diffuse solar radiation whose amount was depending on the array location. When it comes to the lowest array, nearly 7% of annual insolation was blocked by front building. The shading analysis, furthermore, revealed that the overhang louvers caused a partial shading problem in spite of short extrusion of 40 mm depth all through the year, and particularly, showed a big effect during summer because of high solar altitude. The extruded louvers caused decrease in 4.5% of average insolation loss over the year.